[jira] [Created] (CALCITE-1943) Add back NavigationExpander and NavigationReplacer in SqlValidatorImpl

[Dian Fu (JIRA)]

Dian Fu created CALCITE-1943:
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             Summary: Add back NavigationExpander and NavigationReplacer in 
SqlValidatorImpl
                 Key: CALCITE-1943
                 URL: https://issues.apache.org/jira/browse/CALCITE-1943
             Project: Calcite
          Issue Type: Bug
            Reporter: Dian Fu
            Assignee: Julian Hyde


{{NavigationExpander}} and {{NavigationReplacer}} was deleted as a fix of issue 
CALCITE-1871. Just create this ticket to track whether we should add them back.



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